record installation devices

src/Core/Models/Api/Request/PushSendRequestModel.cs

@@ -8,6 +8,7 @@ namespace Bit.Core.Models.Api
     {
         public string UserId { get; set; }
         public string OrganizationId { get; set; }
+        public string DeviceId { get; set; }
         public string Identifier { get; set; }
         [Required]
         public PushType? Type { get; set; }

src/Core/Models/Data/InstallationDeviceEntity.cs

@@ -0,0 +1,36 @@
+using System;
+using Microsoft.WindowsAzure.Storage.Table;
+
+namespace Bit.Core.Models.Data
+{
+    public class InstallationDeviceEntity : TableEntity
+    {
+        public InstallationDeviceEntity() { }
+
+        public InstallationDeviceEntity(Guid installationId, Guid deviceId)
+        {
+            PartitionKey = installationId.ToString();
+            RowKey = deviceId.ToString();
+        }
+
+        public InstallationDeviceEntity(string prefixedDeviceId)
+        {
+            var parts = prefixedDeviceId.Split("_");
+            if(parts.Length < 2)
+            {
+                throw new ArgumentException("Not enough parts.");
+            }
+            if(!Guid.TryParse(parts[0], out var installationId) || !Guid.TryParse(parts[1], out var deviceId))
+            {
+                throw new ArgumentException("Could not parse parts.");
+            }
+            PartitionKey = parts[0];
+            RowKey = parts[1];
+        }
+
+        public static bool IsInstallationDeviceId(string deviceId)
+        {
+            return deviceId != null && deviceId.Length == 73 && deviceId[36] == '_';
+        }
+    }
+}